Corrosion-resistant member

Patent metadata

Field	Value
Publication number	US-11457766-B2
Application number	US-201716470693-A
Country	US
Kind code	B2
Filing date	Sep 1, 2017
Priority date	Dec 19, 2016
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A corrosion-resistant member (10) provided with: a base material (16) made of aluminum or an aluminum alloy; a diamond-like carbon film (18) formed on a surface of the base material (16) and made of amorphous carbon (a-C) or hydrogenated amorphous carbon (a-C:H); and an epoxy resin-containing coating material (20), which at least fills open pores (24) of the diamond-like carbon film (18).

First claim

The invention claimed is:

1. A corrosion-resistant member having acid resistance and comprising a base, a diamond-like carbon film, and a coating that contains epoxy resin, titanium oxide and carbon black,
wherein the base contains aluminum or an aluminum alloy,
the diamond-like carbon film is formed on a surface of the base and contains amorphous carbon or hydrogenated amorphous carbon, wherein the diamond-like carbon film has an open hole, and
at least the open hole of the diamond-like carbon film is filled with the coating, and
wherein a mass ratio in the coating of the epoxy resin:the titanium oxide:the carbon black is in a range from 5:1:1 to 20:10:10.

2. A corrosion-resistant member having alkalai resistance and comprising a base, a diamond-like carbon film, and a coating that contains epoxy resin and chromium oxide,
wherein the base contains aluminum or an aluminum alloy,
the diamond-like carbon film is formed on a surface of the base and contains amorphous carbon or hydrogenated amorphous carbon, wherein the diamond-like carbon film has an open hole, and
at least the open hole of the diamond-like carbon film is filled with the coating, and
wherein a mass ratio in the coating of the epoxy resin:the chromium oxide is in a range of 5:1 to 20:10.

3. The corrosion-resistant member according to claim 1 , further comprising an intermediate layer interposed between the diamond-like carbon film and the surface of the base, wherein the intermediate layer includes a gradient layer in which a portion farther from the base contains a smaller ratio of aluminum and a larger ratio of diamond-like carbon.

4. The corrosion-resistant member according to claim 1 , wherein the coating forms a coating layer that covers at least a part of the diamond-like carbon film.

5. The corrosion-resistant member according to claim 4 , wherein the diamond-like carbon film includes a sliding surface exposed from the coating layer while the open hole is filled with the coating.

6. The corrosion-resistant member according to claim 5 , wherein the sliding surface is slid along a mating member that contains a stainless steel, a polyacetal resin, or a polytetrafluoroethylene.

7. The corrosion-resistant member according to claim 6 , wherein the mating member contains a stainless steel of SUS304, SUS303, or SUS316.

8. The corrosion-resistant member according to claim 6 , wherein a fluorine-based grease is interposed between the sliding surface and the mating member.

9. The corrosion-resistant member according to claim 6 , wherein the corrosion-resistant member is a shaft member, and the mating member is a bearing member for the shaft member.

10. The corrosion-resistant member according to claim 1 , wherein the corrosion-resistant member is a member of an apparatus for treating a beverage or a food.

Assignees

• Smc Corp

Inventors

• Okuhira Hiroyuki

Classifications

• C23C14/08

  Oxides (C23C14/10 takes precedence) · CPC title

• C23C14/0605 Primary

  Carbon · CPC title

• C23C14/024

  Deposition of sublayers, e.g. to promote adhesion of the coating (C23C14/027 takes precedence) · CPC title

• C23C14/32

  by explosion; by evaporation and subsequent ionisation of the vapours {, e.g. ion-plating}(C23C14/34 - C23C14/48 take precedence) · CPC title

• B32B15/092 Primary

  comprising epoxy resins · CPC title